package system.cashier;

/**
 * Created by 陈文杰 on 2022/4/13 19:28
 */
public interface CashierInterface {

    //扫描商品
    void scan(String ids);

    //修改商品数量
    void alterCommodityNumber();

    //结账
    double settleAccounts();

    //打印票据
    void printBill();
}
